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arXiv 1407.7348physics.ins-dethep-exnucl-ex
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在80和233 keV液态氩中核反冲的电离产额测量

Measurement of the ionization yield of nuclear recoils in liquid argon at 80 and 233 keV

A. Bondar, A. Buzulutskov, A. Dolgov, E. Grishnyaev, S. Polosatkin, L. Shekhtman, E. Shemyakina, A. Sokolov

摘要:

核反冲探测器的能量刻度对于诸如直接寻找暗物质和相干中微子-核散射等稀有事件实验至关重要。特别是,这样的校准是通过测量的电离产率的核反冲在液体Ar和氘检测介质,使用中子弹性散射离开核。在目前的工作中,第一次在较高的能量范围内,在80和233千电子伏,使用两相低温雪崩探测器(CRAD)和DD中子发生器的液体Ar中的核反冲的电离产额进行了测量。在电场为2.3 kV/cm时,在80 keV和233 keV时,Ar的电离产额分别为7.8 ± 1.1和9.7 ± 1.3 e-/keV。与Jaffe模型相比,Jaffe模型能较好地描述原子核反冲电离产额的能量依赖关系。

英文摘要:

The energy calibration of nuclear recoil detectors is of primary importance to rare-event experiments such as those of direct dark matter search and coherent neutrino-nucleus scattering. In particular, such a calibration is performed by measuring the ionization yield of nuclear recoils in liquid Ar and Xe detection media, using neutron elastic scattering off nuclei. In the present work, the ionization yield for nuclear recoils in liquid Ar has for the first time been measured in the higher energy range, at 80 and 233 keV, using a two-phase Cryogenic Avalanche Detector (CRAD) and DD neutron generator. The ionization yield in liquid Ar at an electric field of 2.3 kV/cm amounted to 7.8+/-1.1 and 9.7+/-1.3 e-/keV at 80 and 233 keV respectively. The Jaffe model for nuclear recoil-induced ionization, in contrast to that Thomas-Imel, can probably consistently describe the energy dependence of the ionization yield.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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